Aramp is made using a board. the board is 12 ft long. the ramp is 3 ft. high. what angle does the ramp make with the ground.

Which ahows the graph of the solution set of 6x+4y< 12

Amanager recorded the number of bicycles sold by his company each quarter. his projected sales after t years is given by the expression below. which of the following statements best describes the expression? a. the initial sales of 575 bicycles increases at the rate of 4% over 4 quarters. b. the initial sales of 575 bicycles increases at the rate of 18% over 4 years. c. the initial sales of 575 bicycles increases at the rate of 4% over t quarters. d. the initial sales of 575 bicycles increases at the rate of 18% over t years.

Can someone tell me if this is perpendicular? !